What Are the Differences in Fuel Types? | West Baird, TX

What Are the Differences in Fuel Types? | West Baird, TX

You’re probably paying a bit closer attention to the gas pump these days, and so you might find yourself asking: What are the differences between fuel types? If you want to make sense of what makes an 87-octane different from a 93-octane and what the heck diesel even is, here’s what you need to know.

Octane ratings

Most fuels are accompanied by an octane rating, which is typically 87, 89, 91, 93, or 94. The higher the octane rating, the more stable the fuel is. It’s all quite complex, but the number comes from the mixture of air and fuel, which impacts efficiency when a vehicle starts up.


Octane ratings tend to get broken up into three grades: regular, mid, and premium. Regular-grade fuel is your 87-octane, mid-grade is 89-octane, and premium falls between 91- and 94-octane. If your vehicle only requires an 89-octane, there’s no reason to pay more for the higher-grade fuel unless it supports it and you want better performance.

What’s diesel?

Diesel almost always costs more than regular petrol because it’s thicker and, thus, has more engine density. This is why diesel engines like the 3.0-liter Duramax® Turbo-Diesel get great fuel economy even when they put out huge performance numbers. Naturally, you won’t want to use diesel on your vehicle unless it has a diesel engine.

Have more questions about the differences in fuel types? Looking for something more efficient? Just ask the experts at Hanner Chevrolet in Baird, Texas.

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